English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

Photocatalytic production of the electron (e(-)) and positive hole (h(+)) in an aqueous suspension of TiO2 (anatase form) under illumination by near-UV light (295-390 nm) generated the superoxide (O2 (-)) and hydroxyl radical (•OH), which both proceeded linearly with reaction time, while H2O2 accumulated non-linearly. Under anaerobic conditions (introduced Ar gas), the yields of three active species of oxygen were decreased to 10-20% of those detected in the air-saturated reaction. The electron spin resonance (ESR) signal characteristics of •OH were obtained when a spin trap of 5,5-dimthyl-1-pyrroline-N-oxide (DMPO) was included in the illuminating mixture. The intensity of the ESR signal was increased by Cu/Zn superoxide dismutase, and decreased under anaerobic conditions, amounting to only 20% of the intensity detected in the aerobic reaction. The addition of H2O2 to the reaction mixture resulted in about an 8-fold increase of •OH production in the anaerobic reaction, but only about 1.5-fold in the aerobic reaction, indicating that e(-) generated by the photocatalytic reaction reduced H2O2 to produce •OH plus OH(-). On the other hand, D2O lowered the yield of •OH generation to 18% under air and 40% under Ar conditions, indicating the oxidation of H2O by h(+). The addition of Fe(III)-EDTA as an electron acceptor effectively increased •OH generation, 2.3-fold in the aerobic reaction and 8.4-fold in the anaerobic reaction, the yield in the latter exceeding that in the air-saturated reaction.

Hydroxyl Radical Generation Depending on O2or H2O by a Photocatalyzed Reaction in an Aqueous Suspension of Titanium Dioxide

Hydroxyl Radical Generation Depending on O₂or H₂O by a Photocatalyzed Reaction in an Aqueous Suspension of Titanium Dioxide